IG710S and SR710S Sensors

NIR On-Line Coatweight and Moisture Measurement Sensors for Coating and Converting Industries

Coatweight and Moisture Measurement Sensors


The IG710S and SR710S coatweight and moisture measurement sensors are for online measurement of coatings, laminates and moisture. The sensors are specifically designed to meet the needs of converting industry for measuring the coatweight thickness and moisture. Using near-infrared (NIR) non-contact principle for online moisture measurement it is suitable for many types of continuous processes and will provide real-time moisture measurements that can be used to control the process, monitor product quality and warn operators if the process is moving out of specification, thereby increasing yield and improving quality. When using this online sensor, improves process efficiency resulting in substantial cost reductions and investment payback in a matter of months.

Operating principle

The IG710S & SR710S online coatweight and moisture measurement sensors work on the principle that water and organic products, such as coatings, absorb near-infrared light (NIR) at specific wavelengths. When exposed to NIR light, a product will absorb a proportion of this energy depending on the active constituent that is present. By pulsing light at a different known wavelength, the sensor compares the absorption rate to an internal reference thus making it possible to determine exactly by how much each wavelength is being absorbed. Using high-speed signal processing the algorithm converts the infrared signals into an output that is proportional to moisture and coatweight thickness by means calibration curve. The measurement is unaffected by changes in process conditions such as particle size, product height temperature, ambient lighting and humidity changes.


  • PSA labelstock coating
  • Tapes
  • Coated paper & film
  • Laminates
  • Thermal lamination films
  • Solar films
  • PVDC coating
  • Lacquer on aluminium foil
  • Flexible packaging
  • Poly coating

NDC Technologies experience

NDC Technologies have nearly 40 years experience in applying NIR technology to their in-process measurement systems. This experience is engineered into every gauge model to ensure that the user can easily employ the gauges without specialist knowledge yet will benefit from accurate and dependable measurement from day one.

Stable dependable measurement

Providing stable measurement is essential in helping our customers improve their process control and maximise efficiency.

Insensitive to ambient humidity and temperature

Designed for purpose and suitable for continuous in-line measurement in harsh industrial applications

Fast measurement rate

Fast measurement rate enables fast process variations to be accurately monitored ensuring the best possible process control.

Network ready

Instaling single or multiple gauges is very simple with OWS operator level workstation and HMI for supervisory access for upto 16 networked gauges

Low cost of ownership

Long term stability combined with industry best performance, low installation costs and no routine maintenance requirements guarantee the lowest cost of ownership.